BAM 1020-9800 Manual Rev W.docx
Page 41
INLET TYPE
This setting helps users identify whether the BAM-1020 is collecting
TSP, PM
10
, or PM
2.5
data. Whichever option is selected sets the corresponding label to be
displayed at the top of the main menu screen. This setting is for providing indication on the
display only and does not impact any of the actual data collection or reports.
STATION #:
This is a station identification number. This number has a range of 001-
254, and will be included in the data reports. The default value is 01.
MET SAMPLE:
This value is the averaging period for the built-in met sensor data logger.
It sets how often the data array is averaged and written to memory, and can be set to 1,5,15,
or 60 minutes. For example, if an optional wind speed sensor is attached to the BAM 1020,
the MET SAMPLE period could be set to 1 or 5 minutes. This value applies to all parameters
and sensors attached to the BAM 1020, except for the dust concentration data which is
always an hourly average regardless of this setting.
Warning:
This setting will affect how long the memory will last before getting full!
There are
4369 records
available in the memory. The default MET SAMPLE period of 60
minutes (1 record per hour) will result in 182 days of memory capacity, but a 1 minute
average period would fill up these memory records in only 3 days. When the memory gets full
the BAM 1020 overwrites the oldest data. It is recommended that the MET SAMPLE period
set at the default value of 60 minutes unless a faster average is required for a particular met
sensor application.
MET SAMPLE
Data Capacity
60 min
182 days
15 min
45 days
5 min
15 days
1 min
3 days
RANGE:
The RANGE setting sets the full-scale range of the concentration measurement
system of the analog voltage output. The BAM-1020 internal digital data logger range will
vary depending on the DYNAMIC RANGE setting (see section 6.11.2). The RANGE value is
usually kept at the default setting of 1.000 mg, with a default OFFSET (lower limit of the
range) of -0.015 mg. This means that the BAM measures a maximum full-scale range of -
0.015 mg + 1.000 mg = 0.985 mg by default. The table below shows some examples of how
the RANGE and OFFSET setting interact to produce the concentration data outputs.
OFFSET
Setting
RANGE
Setting
Dynamic
Range
Setting
Resulting Digital
Data Range
Resulting Analog
Output Range
-0.015 mg
1.000 mg STANDARD
-0.015 to 0.985 mg
0-1V = -0.015 to 0.985 mg
-0.005 mg
1.000 mg EXTENDED
-0.005 to 9.995 mg
0-1V = -0.005 to 0.995 mg
-0.015 mg
0.200 mg EXTENDED
-0.015 to 9.985 mg
0-1V = -0.015 to 0.185 mg
0.000 mg
1.000 mg STANDARD
0.000 to 1.000 mg
0-1V = 0.000 to 1.000 mg
-0.015 mg
2.000 mg STANDARD
-0.015 to 1.985 mg
0-1V = -0.015 to 1.985 mg
The RANGE value may be set to 0.100, 0.200, 0.250, 0.500, 2.000, 5.000, or 10.000 mg.
It
is important to understand this setting if an external data logger is used to log the BAM 1020
analog output, since the data logger must be set to scale the analog voltage correctly. See
Section 8
.
